Planer-knife grinder



(Mode1.)

M. w; PALMER.

PLANER KNIFE GRINDER. No. 267,579. Patented Nov. 14, 1882.

ATTORNEYS.

UNrrn TATES L TENT FFlCEe MERRITT \V. PALMER, OF HOLLAND, ASSIGNOR OF ONE-HALF TO CHARLES R. BROWNELL, OF HAMILTON, MICHIGAN.

PLANER-KNIFE GRINDER.

SPECIFICATION forming part of Letters Patent No. 267,579, dated November 14, 1882.

Application filed August 16, 1882. (Model.)

.1 all whom it may concern:

Be it known that I, MERRITT W. PALMER, of Holland, in the county of Ottawa and State of Michigan, have invented a new and Improved Planer-Knife Grinder, of which the following is a full, clear, and exact description.

My invention consists of an attachment to be temporarily applied to wood-planing ma- 1o chines for grinding the cutters or knives on the machine as set for work, and without removing or disturbing them, whereby I am enabled to grind them more accurately and with much less time and labor than in the common way,

1 the attachment being more readily applied to the planing-machine than the knives can be removed and applied again, all as hereinafter fully described.

Reference is to be had to the accompanying 2o drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in both the figures.

Figure l is a perspective view of a portion of awood-planer with my improved knifegrinder attached, and Fig. 2 is partly an end elevation of the machine and partly a transverse section.

a represents the bed of the planer, and b the cutters or knives, the latter being attached to 0 the arbor c, the same as in use.

d represents an emery or other rotary grinder, fitted so as to revolve with and traverse on the mandrel e, whereon it is mounted, and said mandrel is mounted in vertically-adj ustable 3 5 boxes f on upright supports 9, which are notched at the lower end to be temporarily placed on the planer knife-arbor c, as shown at h, whereon they are supported by braces i and the rod'j, adjustable by nut 12, working on 40 thread 19, the braces being jointed to brackets is, permanently attached to the planer-bed, and also jointed to projections from the uprights at I, the connections with the brackets is being readily detachable.

j is a nut on the upper end of the rod or counter-brace j, to hold it firmly to the top of support g. v

The grinder is fitted to the mandrel e by a joints of the braces i.

feather, m, and groove 72, so as to be shifted along it from end to end by a leading-rod, 0. The boxes fare suspended from the screws 19, which work in threads in the tops of supports 9, so that the grinder-mandrel 6 may be adjusted with respect to the knife-holder on shaft or mandrel c.

The brackets 7c are attached to the bed a, where they will not be in the wayof the regular operations of the machine, and therefore do not have to be removed, the braces t being connected to and disconnected from them when the attachment is applied to and removed from the machine.

The stud g, by which the adjusting-rod j is secured, is also permanently attached. Said rodj is tightened up by a not when the attachment is applied to take up the slack of the The boxes f are then adjusted and the set-screws r are tightened on the arbor c. The attachment is then ready for work, and is to be set in motion by a belt on the pulley s, for revolving the grinder, and by shifting the grinder along the mandrel by hand, with the rod 0 traversing it forward and backward thereon, fast or slow, as may be required, until the grinding is completed of the cutter set to the grinder. The screws r are then slackened, the arbor c shifted, and another cutter adjusted to the grinder, as before, and so on until all are ground.

The difficulty ot' resetting the cutters after being removed for grinding in the common way is thus wholly avoided, and much better work is secured. I do not limit myself to the particular construction and arrangement of the attachment herein'represented, for it is obvions that it may be modified in some of the details.

Having thus fullydescribed my invention, I claim'as new and desire to secure by Letters Patent- 1. The combination, with a support, g, having a notched seat, h, of the arbor c, the braces i, pivoted at It and to a projection from said support, and a rod,j whereby said support may be held in position, as described.

2. The combination of the rodj with the up- 4. The binding-screws r, in combination with arbor c and the upright supports g, having 10 notched seats h, and supporting the mandrel 0 and grinder 61, substantially as described.

MERRITT W. PALMER.

right supports 9, adjusting-boxes f, arbor e, grinder d, and braces i, substantially as described. n

3. The upright supports g, having notched seats 71, fitted to arbor c, and provided with ad jusiing-hoxesf, braces i, rod j, arbor e, and grinder (I, in combination with the planer-arbor c and cutters b, substantially as described.

Vitnesses FRANK DALTON, ISAAC FAIRBANKS. 

